VERIFIED

yukinarit__pyserde-430

VERIFIED on first verdict

1 attempt, 0 appeals. 1 file, 5 added and 1 removed lines. Tokens: 470,795 tokens. Model cost: $0.14. Sandbox time: 9 min 56 s.

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The plan

Repository: yukinarit/pyserde
Base commit: 2855b6b (image tag)
Issue: `alias` on `Optional` field breaks deserialization Hi there, Using the latest version (0.12.2), this example consistently deserializes `Foo.a` to `None`: ```py @serde @dataclass class Foo:

Files to edit

serde/de.py

Approach: Modify deser field lookup in deser.py (or similarly placed file) such that when resolving aliases for optional fields, presence checks consider aliased names first rather than skipping due to missing primary key; ensure fallback does not override found value with None unintentionally.

Attempt 1

VERIFIED

Agent branch

Kind	Command	Exit	Duration	Digest
command	`git ls-files -z` exact command git ls-files -z	0	0.004s	60b0143b
command	`grep -n "conv_name" serde/de.py` exact command grep -n "conv_name" serde/de.py	0	0.004s	81894d3f
command	`grep -n "def conv_name" serde/de.py` exact command grep -n "def conv_name" serde/de.py	1	0.003s	2d3440ae
command	`grep -n "conv_name" serde/de.py` exact command grep -n "conv_name" serde/de.py	0	0.003s	256fb601
command	`grep -n "conv_name" serde/core.py` exact command grep -n "conv_name" serde/core.py	0	0.003s	7e68c0c3
write	`write serde/de.py` exact command /opt/receipts-a00b9558dd2140bcb4f29a5fe7fa44fe/bin/busybox sh -c 'mkdir -p /pyserde/serde && cp /opt/receipts-a00b9558dd2140bcb4f29a5fe7fa44fe/incoming/4ed7b961e35d629ec047347578faf4701f9972c82eca50e88aa1f3f8adb6b698 /pyserde/serde/de.py'	0	0.005s	2a4f2629
command	`pytest tests/test_basics.py::test_optional_and_alias -v` exact command /opt/receipts-0ff07632e860422b8e43ac9d4bc14f6c/bin/busybox mkdir -p /opt/receipts/reports && python -I /opt/receipts-0ff07632e860422b8e43ac9d4bc14f6c/receipts_pytest.py tests/test_basics.py::test_optional_and_alias -v -o junit_family=xunit1 -p no:cacheprovider -rA --continue-on-collection-errors --junitxml=/opt/receipts/reports/agent1-7.xml	0	2.111s	e8aa065cd663
command	`pytest tests/test_basics.py` exact command /opt/receipts-ac895fc523e64b1b981278d852e69d86/bin/busybox mkdir -p /opt/receipts/reports && python -I /opt/receipts-ac895fc523e64b1b981278d852e69d86/receipts_pytest.py tests/test_basics.py --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning -o junit_family=xunit1 -p no:cacheprovider -rA --continue-on-collection-errors --junitxml=/opt/receipts/reports/agent1-8.xml	0	101.962s	e8aa065cd663

show all 18 steps

Kind	Command	Exit	Duration	Digest
write	`write verify_fix.py` exact command /opt/receipts-fca90136a4f74d97a074340762c134dc/bin/busybox sh -c 'mkdir -p /pyserde && cp /opt/receipts-fca90136a4f74d97a074340762c134dc/incoming/1f2424621072ca839107b14f1b035528a7540bb38e7f3e20749f44475d0d339d /pyserde/verify_fix.py'	0	0.005s	ba483105
command	`python verify_fix.py` exact command python verify_fix.py	1	0.478s	a673949b
command	`grep -n "test_optional_and_alias" tests/test_basics.py` exact command grep -n "test_optional_and_alias" tests/test_basics.py	0	0.003s	347ad5cf
write	`write verify_fix.py` exact command /opt/receipts-f0dfb728df8e4cc3af5375393013df14/bin/busybox sh -c 'mkdir -p /pyserde && cp /opt/receipts-f0dfb728df8e4cc3af5375393013df14/incoming/b3ebc2847608921315f1dea0df5348bfebdb088efdb1815bf7e550ff9f303bb0 /pyserde/verify_fix.py'	0	0.005s	9496a043
command	`python verify_fix.py` exact command python verify_fix.py	1	0.434s	9529b30a
command	`grep -n "from.field" tests/test_basics.py \| head -5` exact command grep -n "from.field" tests/test_basics.py \| head -5	0	0.004s	05577a52

Kind	Command	Duration	Digest
write	`write verify_fix.py` exact command /opt/receipts-554de39e9b5d4481aff03b2c2dfa22e3/bin/busybox sh -c 'mkdir -p /pyserde && cp /opt/receipts-554de39e9b5d4481aff03b2c2dfa22e3/incoming/8c78b218a08730228144fcb7dc2bee0fc256b6b8181ae7285fa4c9c8e19838f0 /pyserde/verify_fix.py'	0.005s	9301ab2a
command	`python verify_fix.py` exact command python verify_fix.py	0.515s	b7a84976
command	`rm verify_fix.py` exact command rm verify_fix.py	0.003s	77a6e80c
diff	`capture patch` exact command compute patch in executor staging agent1-91eb4aeee87c48cd8f7e83c83dfe7c89: /opt/homebrew/Cellar/git/2.53.0/bin/git -c core.hooksPath=/dev/null -c core.attributesFile=/dev/null -c diff.external= -c core.quotePath=false add -A && /opt/homebrew/Cellar/git/2.53.0/bin/git -c core.hooksPath=/dev/null -c core.attributesFile=/dev/null -c diff.external= -c core.quotePath=false diff --cached --binary --no-ext-diff --no-textconv --no-renames e4e7e1698763b9674b40e58484212e12e260fd8b	0.032s	e8aa065cd663

Finish summary: Fixed the issue where `alias` on `Optional` fields broke deserialization. The problem was in the `opt` method of the `Renderer` class in `serde/de.py`, where existence checks for Optional fields weren't considering aliases. Modified the method to use `_exists_by_aliases` when aliases are present, matching the pattern used in other methods like `primitive` and `default`.
Worker outcome: finished

Target tests pass: yes
Full suite passes: yes
Files changed: serde/de.py
Ran tests: yes

Witness branch w1

Kind Command Exit Duration Digest

apply

Kind	Command	Exit	Duration	Digest
apply	`apply patch 5e38835dcc0b` exact command git update-index -q --refresh; git apply -v --3way --recount --ignore-space-change --whitespace=nowarn /opt/receipts-b912f41b166d438486a03ea7d80449ce/incoming/5e38835dcc0bb9a9fcbd85c92c8c24c5331bed10c47c5ed930111c8f9b488f28.diff	0	0.009s	e8aa065cd663
verification	`pytest (witness) tests/test_basics.py` exact command /opt/receipts-44189561a54f4854a62feb69837ab97e/bin/busybox mkdir -p /opt/receipts/reports && python -I /opt/receipts-44189561a54f4854a62feb69837ab97e/receipts_pytest.py --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning tests/test_basics.py -o junit_family=xunit1 -p no:cacheprovider -rA --continue-on-collection-errors --junitxml=/opt/receipts/reports/w1-2.xml	0	101.767s	e8aa065cd663

apply patch 5e38835dcc0b

exact command

git update-index -q --refresh; git apply -v --3way --recount --ignore-space-change --whitespace=nowarn /opt/receipts-b912f41b166d438486a03ea7d80449ce/incoming/5e38835dcc0bb9a9fcbd85c92c8c24c5331bed10c47c5ed930111c8f9b488f28.diff

0.009s

e8aa065cd663

verification

pytest (witness) tests/test_basics.py

exact command

/opt/receipts-44189561a54f4854a62feb69837ab97e/bin/busybox mkdir -p /opt/receipts/reports && python -I /opt/receipts-44189561a54f4854a62feb69837ab97e/receipts_pytest.py --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning tests/test_basics.py -o junit_family=xunit1 -p no:cacheprovider -rA --continue-on-collection-errors --junitxml=/opt/receipts/reports/w1-2.xml

101.767s

e8aa065cd663

Gate predicate checklist

Predicate	Name	Status	Evidence
`R1_fail_to_pass`	Failing specification tests now pass	PASS	target tests passed: tests/test_basics.py::test_optional_and_alias
`R2_pass_to_pass`	Previously passing tests kept	PASS	2026 baseline-passing tests still pass
`R3_no_shrink`	No removed tests or new skips	PASS	all 2027 baseline tests collected; skips unchanged (0)
`R4_patch_scope`	Patch scope	PASS	patch touches 1 file(s), all in scope
`R5_provenance`	Witness chain and patch digest	PASS	agent chain c52540c2 -> 77a6e80c unbroken over 18 receipt(s); witness chain c52540c2 -> 333b4f33 unbroken over 2 receipt(s); applied digest matches
`R6_claim_audit`	Agent claim audit (advisory)	PASS	claimed green; own last run: 2027 passed, 0 failed

What it said

Finish summary: Fixed the issue where `alias` on `Optional` fields broke deserialization. The problem was in the `opt` method of the `Renderer` class in `serde/de.py`, where existence checks for Optional fields weren't considering aliases. Modified the method to use `_exists_by_aliases` when aliases are present, matching the pattern used in other methods like `primitive` and `default`.
Worker outcome: finished

Target tests pass: yes
Full suite passes: yes
Files changed: serde/de.py
Ran tests: yes

What the record shows

honest: claimed green; own last run: 2027 passed, 0 failed

SWE-rebench's official grader: resolved

Agrees with the gate

Shipped patch

diff --git a/serde/de.py b/serde/de.pyindex be905d8..a07b6ba 100644--- a/serde/de.py+++ b/serde/de.py@@ -804,7 +804,11 @@ reuse_instances=reuse_instances)) if data.get("f") is not None else None'         if arg.iterbased:             exists = f"{arg.data} is not None"         else:-            exists = f'{arg.datavar}.get("{arg.conv_name()}") is not None'+            if arg.alias:+                aliases = (f'"{s}"' for s in [arg.name, *arg.alias])+                exists = f'_exists_by_aliases({arg.datavar}, [{",".join(aliases)}])'+            else:+                exists = f'{arg.datavar}.get("{arg.conv_name()}") is not None'         return f"({self.render(value_arg)}) if {exists} else None"      def list(self, arg: DeField[Any]) -> str:

Model and costs

Model: NVIDIA Nemotron 3 Super thinking off · temperature 1.0 · top_p 0.95
Tokens: 470,795 tokens
Model cost: $0.14
Sandbox time: 9 min 56 s
Sandbox cost: Token Factory reported cost: 5.128 (unit not published)

Full environment disclosure

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The bundle

Recorded JSON and patches. In these copies the local checkout path is removed from file paths, and the home directory is shown as ~.